It feels like more often than not execs who come in and immediately change things are just pattern matching approaches they've seen previously without actually understanding what they're trying to change. A classic example is Marissa Mayer's attempts to Googlify Yahoo. You can't change a business model or a culture by doing a reorg. It's literally cargo cult behaviour.
What do they care about? The stock options they were granted. The notch in their resume. And of course the money. Relatively short term plays. Surrounding themselves with familiar people cuts down on the tremendous political burden the job bears and allows them to get to those short term profits in an easier way.
Reorganizing away from a functional structure is a weird choice, though.
> Two executives, head of engineering Michael Montano and Dantley Davis, will step down as part of the reshuffling.
Reads to me more like power play.